The M272 E35 engine was the next step in the development of the V6 from Mercedes and was intended to replace the M112 E32 and M112 E37. In addition to the 3.5-liter, the new family includes the M272 E25 and M272 E30, with a working volume of 2.5 and 3 liters, respectively.
The V6-family includes: M112 E24, M112 E26, M112 E28, M112 E32, M112 E37, M272 E25, M272 E30, M272 E35, M276 DE30, M276 DE35.
The new 272nd series of engines was developed on the basis of the M112 E32, the aluminum cylinder block has the same camber of 90 ° with the same inter-cylinder distance of 106 mm. Silumin liners for a piston with a diameter of 92.6 mm, a new crankshaft with a piston stroke of 86 mm, lightweight pistons, lightweight forged connecting rods and a balance shaft in the collapse.
The cylinder heads are aluminum, with 4 valves per cylinder and two camshafts (DOHC), the intake valve stems are reduced from 7 mm to 6 mm, the diameter of the intake valves is 39.5 mm, the exhaust 30 mm. The M272 engine uses a continuously variable valve timing system on both shafts, hydraulic lifters, a two-stage intake manifold with variable length. The timing drive is carried out by a double roller chain, the resource of which is about 150 thousand km. Bosch ME control system 9.7.
Specifications
| Production years | 2004-2013 |
| Displacement, cc | 3498 |
| Fuel system | distributed injection |
| Power output, hp | 258 – 272 (M 272 KE 35) 292 (M 272 DE 35) |
| Torque output, Nm | 340 – 350 (M 272 KE 35) 365 (M 272 DE 35) |
| Cylinder block | aluminum V6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 92.9 |
| Piston stroke, mm | 86 |
| Compression ratio | 10.7 (M 272 KE 35) 12.2 (M 272 DE 35) |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | yes |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 8.0 |
| Fuel type | petrol |
| Euro standards | EURO 4/5 |
| Fuel consumption, L/100 km (for Mercedes E350 W212) — city — highway — combined |
13.8 7.3 9.7 |
| Engine lifespan, km | ~320 000 |
| Weight, kg | 177 |
Disadvantages of the M272 E35 engine
- The weakest point of this power unit is its timing drive.
- Due to the rapid wear of the balancer shaft sprockets, the entire timing drive becomes unusable.
- Another known problem is a stuck exhaust manifold flap.
- Plastic cylinder head plugs ooze oil for 50 – 70 thousand km.
- Overheating of the engine leads to detonation and destruction of the aluminum coating in the cylinders.
